Bit of advice, Never create a forum account and screen name after drinking heavily and imagining stupid shit you would like to do before you die.
I just did this on a bike with a bad steering head bearing that shook like the dickens on every sweeper with uneven pavement and it was still tons of fun.
By the way, this is route 371 and it's name is Koya-Ryujin Skyline. Both Ryujin and Koya are resort areas, and the massive numbers of bikes told me I was on the right road. Koya is a great little traditional town with some intersting temples and shrines. A bit of a tourist trap, so hit it before 10.
I stayed at a little Minsyuku in Ryujin for 4000 yen a night without meals. No restaurants close to eat at, so pack your own, or just pay the extra 4000 yen or so for the traditional dinner and breakfast. Name of the place is 民宿龍神 and the phone number is 0739-79-0020.